Stellar spectral types were initially arranged alphabetically; however, subsequent detailed observations led to the consolidation and reordering of categories, establishing the current OBAFGKM ...

Rarest Stars in the Universe: Stars come in many forms, but some types are so rare that only a handful exist in our galaxy. For example, O-type stars account for just 0.00003% of the stars near the ...

The cosmos is not a tranquil place, and the space weather of distant stars is beginning to reveal its dramatic influence on orbiting planets. Among the most energetic phenomena in stellar environments ...